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- Gas chromatography-coupled electrophysiological recordings (GC-EL)
- from olfactory sensilla within the capsule of Haller's organ of the
- tick Amblyomma variegatum indicate the presence of a number of
- stimulants in rabbit and bovine odours, and in steer skin wash. Some
- of these stimulants were fully identified by gas chromatography-mass
- spectrometry analysis and by matching electrophysiological activity of
- synthetic analogues as: 1) hexanal, 2-heptenal, nonanal, furfural,
- benzaldehyde, and 2-hydroxybenzaldehyde (in all extracts); 2)
- heptanal, 2-, 3-, and 4-methylbenzaldehyde, and gamma-valerolactone
- (only in bovine and rabbit odour). Careful examination of the
- electrophysiological responses permit characterization of 6 receptor
- types: 1) a benzaldehyde receptor, 2) a 2-hydroxybenzaldehyde
- receptor, 3) three types of receptors responding differently to
- aliphatic aldehydes, and 4) a lactone receptor.
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